gistfile1.txt

 def create
   if @discussion.save

     if params[:tags]
       first_tag = ''
       params[:tags].each do |tag|
         if first_tag != tag
           first_tag = tag
           @discussion.discussion_tags.create!(
             taggable_id: tag['taggable_id'],
             taggable_type: tag['taggable_type'].singularize.capitalize,
             position: @discussion.discussion_tags.count + 1
           )
         end
       end
     end